/*
 * Copyright 2010 Katsunori Koyanagi
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package sweezy.anim.action
{
	import flash.display.DisplayObject;
	import flash.display.DisplayObjectContainer;

	public class AddChildAction extends ActionBase
	{

		private var _child:DisplayObject;

		private var _container:DisplayObjectContainer;

		public function AddChildAction(container:DisplayObjectContainer, child:DisplayObject)
		{
			_container = container;
			_child = child;
		}

		override protected function doExecute():void
		{
			if (_container !== null && _child !== null)
			{
				_container.addChild(_child);
			}
		}

		override protected function doRollback():void
		{
			if (_container !== null && _child !== null)
			{
				if (_container.contains(_child))
				{
					_container.removeChild(_child);
				}
			}
		}
	}
}
